[FAB-3049] - Fix Getting Started

Update peer relationships to correct orgs
peer0/1 - Org0 : peer2/3 - Org1
[ci-skip]

Change-Id: Ib3d3088d3ea3eb5e7c5aea9547cafa15bbfb0c7c
Signed-off-by: Nick Gaski <[email protected]>

Author: nickgaski

docs/source/getting_started.rst

@@ -304,7 +304,7 @@ What happened behind the scenes?
 -  Now we have a channel consisting of four peers, and two
    organizations.
 
--  ``PEER0`` and ``PEER3`` belong to Org0; ``PEER1`` and ``PEER2``
+-  ``PEER0`` and ``PEER1`` belong to Org0; ``PEER2`` and ``PEER3``
    belong to Org1
 
 -  Recall that these relationships are defined in the ``configtx.yaml``